题目内容
4．Lucy is playing the piano in her room now，_______？（ ）| A． | is she | B． | isn't she | C． | does she |
分析 Lucy正在她房间里弹钢琴，是吗？
解答 答案：B．
根据Lucy is playing the piano in her room now， ？可知本句考查了反意疑问句：要遵循"前肯后否，前否后肯"的原则，在这里now一般用于现在进行时之中，构成为be+Ving，因为这个句子里面含有is，所以疑问句还用is，Lucy is playing the piano in her room now是肯定句，后面必须用否定式，主语为she．故选B．
点评 要熟记反意疑问句要遵循"前肯后否，前否后肯"的原则，还要选好恰当的助动词．有了系动词、情态动词或助动词的可以直接用．
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